Machine for shaping prewelt shoe uppers



1%; to y 1949. E. A. HOLMGREN MACHINE FOR SHAPING PREWELT SHOE UPPERS Filed Nov. 28, 1947 8 Sheets-Sheet l L I 4 2 90 g: J

5 Eric A. Holmgrenflecki W Gertrude A. H0 ZmgremAdmx 52 "86 ND-QIT'A wt 6, R9. E. A. HOLMGREN MACHINE FOR SHAPING PREWELT SHOE UPPERS 8 Sheets-Sheet 2 Filed Nov. 28, 1947 lnveiar Eric A. Holmgremflec'a' Gertrude A. HoZmgremAdmx.

W fi, W49. E. A. HOLMGREN 294809926 MACHINE FOR SHAPING PREWELT SHOE UPPERS Filed Nov. 28,v 1947 8 Sheets-Sheet 3 v ea I n 306 O .mmmv

64 unf Eric A Holmgremflecal Gertrude-A. HOZmg/"en, Admx.

MACHINE, FOR SHAPING PREWELT SHOE UPPERS Filed Nov. 28, 1947 8 Sheets-Sheet 4 Sept, E, H949. E. A. HOLMGREN fi p MACHINE FOR SHAPING PREWELT SHOE UPPERS Filed Nov. 28, 1947 8 Sheets-Sheet 6 76 zz'a 68 67 lfawenivr Eric A. ffolmgrenflecd GertrudeAfiolmgren Admx. 62 p 1 6, H49. E. A. HOLMGREN 2,480,926

MACHINE FOR SHAPING PREWELT SHOE UPPERS Filed Nov. 28, 1947 8 Sheets-Sheet 8 ventor Eric A. HoLmgren, Dead Gertrude A. Holmgren, Admx.

A I k Patented Sept. 6, 1949 MAOHI'NE FOR SHAPING PREWELT SHOE UPPERS Eric Aeflolmg ren deceased by Gertrude A. Holmgr late of Beverly -Mass en, administratrix, Beverl'y, M'ass., assignor to United Shoe Machinery Corporation, Flemington, N. J., a, corporation of New'Jersey ApplicatiomNovemberZS, 1947, Serial No; 788,404

15 Claims.

This invention relates tomachines for shapingv uppersandis illustrated in its applicationv to machines for: shaping the. end portions of. prewelt uppers; Such a machine isillustrated and. described in the United States LetterstPate-nt N0. 2559;762, granted October 10, 1944', on an.applicationfiledin the name: of Eric A. Hol'mgren. This patent discloses a: two-station machine one station of. which has. operating. instrumentalities constructed and arranged? to shape the toe end portion: of an upper: while the other station. has operating inst'numentalities constructed and arranged to operate on. the heel end. portion. The operating instrumental'ities in the toe station comprise means engaging the outer surface of' the toe end portion. of the upper, a. form constructed and arranged to engage the inner surface of the upper andlto clamp the upper against saidmeans, awiper ion wiping the margin-0f the upper in over. said form, and a mold having the shape ot the toe portion of a lasted" upper, said mold being operable to expand and mold the toe portion or the uppen.v The. heel station is provided. with. all of? the. above-described instrumentalities except the mold'.

It is an object of the present invention to providea machine of the type above described; which is automatically operated". It-is' a. further object of the invention. to provide a machine of the type above described" in which the work supporting and" operating in'strument'alities are so constructed and arranged that the machine may be operated by a relatively unskilled operator, and the work may be inserted into the machine and removed from the machine with ease and facility thus insuring high production and good work;

With the abov'e'obje'cts" in view the present invention in one aspect thereof consists in the provision in a machine of the type above described of hydraulicmeans for operating the innor form andother' means; herein illustrated as a cam, for operating the wiper; The separate mechanisms for operating the form and the wiper are so constructed and arranged that the operator may effect the retraction of the formin order to correct the position of the upper in the machine before operating the wiper if such correction should": be necessary. After repositioning the upper the form is again actuated and the cam mechanism is then operated tocom-- plate the machine cycle. accordance with a further feature of the invention the pressure fluid actuated piston which: operates the inner form ismanually controlled by the operation of a operator to cause the" retraction of the formto permit repositioning of theupp'er.

For positioning a prewelt upper heightwi'se thereof in' themachinea depressor-is constructed and arranged to engage the welted margin and: move it downwardly into a predetermined heightwise position and means is provided for automatically releasing the" depressor after the inner form has clamped theupper' in its predetermined heightwi'se positiom and before the wiper has advanced into upper engaging position.

For causing the welted marginof a supported upper to conform to therperipherali shape: or" contour of the inner form: the wiper has? mounted thereon a member constructed and? arranged to engage the outer edge faceTof: the? welt and. said member'is caused to-advan'ce withithe wiper Joy a member which is disconnectible from the conforming member to: permit the? wiper to continueits advancement after: the conforming member has been positively arrested by its engagement: with a: fixed abutmentmemhen In order to? position? therwelt for engagement by said conforming: member the: illustrated ma-- chine, in accordance with-a further feature of theinvention, is providedwithawelt. engaging; member slidably mounted on the: work supporting member-and constructed: and arranged to engage the upper-attaching surface ofi theweltandforeethe free edgeporti'on 0t therwelt outwardly from the upper, In: accordance: withanother feature of theinvention the il'lustratedi. welt litter is en-- gagedand actuated by said conforming member:

The invention also provides. novel. means for preventing improper operation or the: machine. To: this end there is inserted: into! the electric circuit connected'to'the cluteh'operating solenoid a switch which is operated: by the inner form upon the completion of; its advancement-into the supported: upper. The provision of such aiswi-tch. in the illustrated machine. prevents the advancement. of the: wiper until the inner form; is in posi-- tionin the upper to-supportthewelted:margin for theoverwipingoperatiom Inorder tolrequire a1- ternate operation of the'iilustratedtwo-station machine thus. to insure a sufiicient maintenance of the pressure of. the. machine parts uponthe. work to efiect the required shapingthereofi, there is inserted. into the-solenoidicircuit in each station a switch which is open when the: wiper is advanced and closed by the wiper upon the completion of itsretracting movement. Inasmuch as the operation of the machine cycles with the wiper coming vanced position at the end will be understood that after operating one station the operator will leave the upper under pressure in that station and insert another upper into the other station in which the operating instrumentalities are then retracted and in position to receive an upper to be operated upon.

These and other features of the invention will now be described with reference to the accompanying drawings and pointed out in the appended claims.

In the drawings,

Fig. 1 is a side elevation of a machine embodying the present invention, portions of the frame being broken away to disclose the operating mechanism;

Fig. 2 is a section taken substantially on line II-II of Fig. 1;

Fig. 3 is a plan view illustrating in its retracted position the mechanism for operating on the toe portion of an upper;

Fig. 4 is a section line IV-IV of Fig. 3;

Fig. 5 is a side elevation illustrating a portion of the mechanism shown in Fig, 4;

Fig. 6 is a, side elevation illustrating particularly the mechanism for operating the toe mold;

Fig. 7 is a side elevation illustrating the mechanism in the head of the machine fOr operating on the toe portion of the upper, said mechanism being shown in its position just prior to the beginning of the cam cycle of the machine;

Fig. 8 is a section taken substantially on the line VIIIVIII of Fig. '7;

Fig. 9 is a section on the line IXIX of Fig. 8;

Fig. 10 is a section on the same plane as Fig. 8 showing the operating mechanism in its position at the end of the machine cycle;

Fig. 11 is a section on the line XI-XI of Fig. 10;

Fig. 12 is an elevation taken in the direction of the arrow in Fig. 8 and showing the work supporting and welt lifting mechanisms at one side of an upper in the machine;

Fig. 13 is a wiring diagram; and

Fig. 14 is a cam chart.

Referring to Fig. 1 the numeral 20 identifies an electric motor which has secured to its shaft 22 a pulley 24 connected by a belt 26 to a pulley 28 on a worm shaft 30. The motor shaft also has secured thereto a pulley 32 connected by a belt 34 to a large idler pulley 36. A smal1 pulley 38 arranged to turn with the pulley 36 is connected by a belt 48 to a large pulley 42 secured to the shaft of a constant-pressure hydraulic pump. Fixed to the shaft 38 is a worm 44 which operates a worm gear 46 freely mounted on a shaft 48 which has fixed thereto a spur gear 5|] which meshes with a spur gear 52 secured to a cam shaft 54. The ratio between the gears 58 and 52 is such that the shaft 48 makes one complete rotation to turn the cam shaft 180. A one revolution clutch mechanism (not shown) is provided for operatively connecting the worm gear 46 to the shaft 48, said clutch mechanism being operated by a solenoid 56 which is actuated by closing two push button switches one of which is identified by the numeral 58.

For supporting and shaping a prewelt upper the illustrated machine is provided with instrumentalities generally similar in their construction and operation to instrumentalities provided is divided into two to rest in its adtaken substantially on the of the first cycle, it

for the same purposes in the machine illustrated and described in the patent hereinbefore referred to. Referring to Figs. 1 and 8 an inverted prewelt upper is supported on two plates 60 carried by a slide 82 and mounted for swinging movement toward and from each other on pins 62 (Fig. 8). The mutually adjacent portions of said plates are recessed to provide space for the toe portion of the upper and an upstanding flange 64 (Fig. 9) is provided in each plate at the edge of said recess, said flange being beveled at its upper extremity, as shown in Fig. 9, to enter the welt crease of a prewelt upper 66. The work supporting plates 60 are normally held in an outspread position by torsion springs 65 (Fig. 9) surrounding the pins 83 and engaging cars 69 projecting downwardly from the plates 60. The outspread position of said plates is determined by screws H mounted in lugs 15 (Fig. 8) projecting outwardly from the ears 69, said screws engaging downwardly extending portions of the slide 62. In the operation of the machine the forward portions of the plates 60 are swung inwardly against the opposite side portions of the upper by the rearward movement of a toe form or plate 12. For limiting such swinging movement each of said plates is provided with a stop screw 11 mounted on a bracket 19 secured to the plate and arranged to engage a downwardly extending portion of the slide 62. While the upper is supported on said plates 60 a wiper plate 61 (Figs. 8 and 9) mounted on a slide 68 advances to wipe the welted margin inwardly over a flange 18 in the toe form 12, said toe form engaging a narrow area of the inner surface of the toe portion of the upper adjacent to the welt attaching seam 13. The wiper plate is then pressed downwardly against the welted margin to grip it against the flange 10' in order to hold it against heightwise displacement and a toe form or mold 14 is operated to expand and shape the toe portion of the upper. Prior to the operation of the toe mold the slide 82 is retracted into its position illustrated in Fig. 11 to provide clearance for the toe molding operation.

The construction and arrangement of the work supporting and operating instrumentalities above described is generally similar to the construction and arrangement of like instrumentalities illustrated and described in the patent hereinbefore referred to.

The illustrated toe form 12 is secured to a head 18 (Fig. 1) which also mounts the toe mold 14, said head being secured to a rock shaft 18 journaled in bearings in the machine frame. At one end thereof the rock shaft is bored to receive an electrically operated heating cartridge (not shown). For turning said shaft in a counterclockwise direction, as seen in Fig. 1, to advance the form and the mold from their retracted position illustrated in Fig. 1 to their position within the supported upper, illustrated in Fig. 9, the illustrated machine is provided with a pressure fluid actuated piston controlled by a treadle 82 and operatively connected to an arm 84 secured to the rock shaft 18. The treadle 82 is secured to the central portion of a shaft 86 (Figs. 1 and 2) journaled in bearing members 88 at the base of the machine frame. Fixed to the opposite end portions of the shaft 86 are upwardly extending arms 90 and 92. The arm 90 opens a valve to admit pressure fluid into the upper portion of a cylinder 94 in which the piston 80 is mounted and the arm 92 operates a similar valve ea an for admitting pressure to fluid into the upper portime of a similar cylinder 96 (Fig. 2) in which operates a piston 98 which operates a mold for shaping the heel portion of the upper. In the illustrated machine the pistons 80 and 9B operate oppositely, the piston 98 being at the downward limit of its motion when the piston 86- is at the upward limit of its motion, as shown in Fig. 2. Duplicate mechanisms are provided for connecting the arms 90 and t2 to the respective valves. Referring to Fig. 1, illustrating the connections from the arm 9h to the valve which controls the operation of the piston 86, a horizontal arm I extending from the front of the machine rearwardly is pivotally mounted at its forward end to the upper end of the arm 36' and is suspended at' its central portion on a link I02 extending upwardly to the horizontal arm of a bell crank lever I94 pivotally mounted on a shaft H36. When the head 16 is in its retracted position illustrated in Fig. 1 the bell crank lever IE4 is at the limit of its counterclockwise movement as seen in Fig. 1 and a pin I88 in the end of the upwardly extending arm of a bell crank lever IID secured to the valve shaft I I2 is seated in a notch in the bottom margin of the arm I011. The counterclockwise movement of the valve shaft effected by the depression of the treadle 82 opens the valve to admit pressure fluid transmitted by a pump II4 to a conduit (not shown) communicating with the upper portion of the cylinder 94 and thus effecting downward movement of the piston 8E). The piston has an upwardly extending rod IIIi connected by a link H8 to an arm I mounted on the shaft I22 and constructed and arranged to actuate-an arm I 24 connected to a link I25 to a bell crank lever I28 freely mounted on a shaft I38 and connected by a link I32 to a lever I34 freely mounted on a shaft I36 in the head of the machine. The lever I34 has a downwardly extending arm I38 connected by a link M9 to the arm 84 secured to the rock shaft 18. The piston 80 operates the train of mechanism above described to turn the rock shaft 18 in a counterclockwise direction, as seen in Fig. 1, thereby to bring the toe form 12 into its position illustrated in Fig. 9 in which it presses the toe portion of the upper forcibly against the upwardly extending flanges 64 of the plates 65) thereby to hold the upper in position for the operation of the wiper slide 68.

In order to determine accurately the position of the toe portion of the upper heightwise thereof in the machine, a depressor plate I42 (Fig. 5) is secured to an upwardly curved arm I44 mounted on parallel arms I45 and I48 pivotally mounted in the machine head. The bottom of the depressor plate I42 is provided with a recess I50 terminating in a beveled wall having the general curvature of the toe portion of the welted margin of the upper. The arm I48 is swung in a counterclockwise direction, as seen in Fig. 5, to cause the depressor plate I42 to engage the adjacent edge faces of the welt and the upper and move them downwardly slightly into a predetermined position and to hold them in this position until the toe form 12 engages the inner surface of the upper and presses the upper forcibly against the flanges 64 of the upper-supporting plates 60. The operations of the machine are so timed that the depressor plate remains in its upper depressing position for only an instant, and is returned to its uplifted position immediately after the toe form 12 engages the upper in order to provide: clearance for the operation of the wiper slide 68.. The arm I44 carrying thev depressor plate M2 is operated by the lever I34 which has an upwardly extending head terminating in a cam surface I 52- which engages av roll I54 on an arm I56 mounted on a shaft I58. The operation oi the lever E34 swings. the arm I56 in a clockwise direction, as seen in Fig. 5, and this motion is imparted to an arm IBIE mounted on the shaft- Iid. Extending laterally from the arm Iii-ii is a pin F62 which engages a hook at the free end of anarm IE4 pivoted toand projecting upwardly from the arm I 48. A torsion spring 66 urges the arm H54 in a clockwise direction as seen in Fig. 5 tomaintain engagement of the hook with the pin I62". The extent of downward movement of the depressor plate I42 is determined by the adjustment of a headed pin I82; which mounts the cam roll- I54, longitudinally of a slot I84 in the arm I56. The pin I82 is secured in adjusted position in said slot by a clamping nut (not shown) on its threaded end portion. To assist in the adjustment of the pin I32 and. to prevent accidental displacement thereof during the operation of the machine a set screw I86 is mounted in a boss in the arm I56 and arranged to engage the pin I82. After the depressor plate I42 comes to the limit of its downward movement the roll I54 rides on a, dwell in the cam surface I52. During the latter part of the operation of the piston after the toe form 12 has clamped the upper against the supporting plates 60 a roll IE8 on the lever I34 engages the upper member of a forked arm I10 and swings it in a counterclockwise direction as seen in Fig. 5, rocking a shaft I12 to which the arm is fixed. Also fixed to the said shaft is an arm I14 constructed and arranged to engage the headed end of a sliding pin I15 mounted in the machine frame and move it to the left as seen in Fig. 5 to disengage the hooked end of the arm I54 from the pin I62 and permit a spring I18 to return the depressor plate I42 to its uplifted position shown in Fig. 5, said spring being connected to the end of an arm I which actuates the arm I46.

The piston 80 comes to rest at the limit of its downward movement with the downward fluid pressure exerted thereon maintained and the operator inspects the upper to ascertain whether it is correctly positioned in the machine. If it is incorrectly positioned the operator takes his foot ofi the treadle 82 and a spring I93 (Fig. 1) connected to the arm 95 swings the arm to the right as seen in Fig. 1 to reverse the position of the valve thereby releasing the fluid pressure on the piston 80 and permitting a spring I92 connected to the arm I20 to operate the mechanism above described to return the toe form 12 to its rest position illustrated in Fig. 1. Thereupon the operator corrects the location of the upper on the supporting plates 60 and again depresses the treadle 82 to cause the upper to be positioned heightwise thereof by the depressor plate I42 and clamped against the supporting plates 60 by the toe form 12.

While holding the treadle 82 depressed in order to retain the toe form 12 in its clamping position the operator pushes the button 58 with his right hand and pushes a like button 392 (Fig. 13) with the left hand to close the electric circuit which operates the solenoid 58. The solenoid actuates a one revolution clutch mechanism (not shown) to connect the worm gear 46 to the shaft 48 thus causing the cam shaft 54 to rotate in the direction of the arrow in Fig. 1. At an early stage in the rotation of the cam shaft a cam I94 engages a roll on the upwardly extending arm of the bell crank lever I04 and swings said lever in a clockwise direction as seen in Fig. 1 to disengage the arm I from the pin I08 on the valve operating bell crank lever IIO. Thus the connection from the treadle 82 to said bell crank lever is broken and the bell crank lever will be automatically operated during the latter part of the cam cycle to reverse theposition of the valve without disturbing the treadle 82. For so operating the bell crank lever I I0 a bell crank lever I96 is mounted on the shaft I06 and connected by a link I98 to the bell crank lever H0, and a rise 312 on a cam 200 mounted on the cam shaft 54 is arranged to engage a roll on the upwardly extending arm of the bell crank lever I96 to swing said lever in a clockwise direction as seen in Fig. 1.

I For operating the wiper slide 68 a cam 202 (Fig. 2) is secured to the cam shaft 54. In one face of said cam there is a groove which receives a roll 204 mounted on an arm 206 pivoted on a shaft 208. Extending upwardly from the hub of the arm 206 is an arm 209 (Fig. 1) connected by a link 2I0 to a lever 2I2 mounted on the shaft I30. As illustrated in Fig. 2 the lever 2I2 has a cylindrical crosshead 2I6 carrying at each end a pivotally mounted block 2I8 mounted in a vertical groove 220 (Fig. 4) in an extension 222 of the wiper slide. During the initiial advancement of the wiper slide it is supported upon two forward rolls one of which is identified by the numeral 224 in Fig. 4 and two rear rolls one of which is identified by the numeral 226. When the wiper plate 61 (Fig. 9) engages the welted margin of the upper it rises, lifting the slide 68 from the forward rolls 224, and the forward portion of the wiper assembly is supported thereafter by said welted margin. During the overwiping operation wiping pressure is applied to the wiper plate in the first instance by two spring pressed rolls one of which is identified by the numeral 228 and finally by two spring pressed rolls 230 carried by the head I6. After the wiper plate comes to the limit of its overwiping movement further downward pressure is applied thereto by means hereinafter described to clamp the welted margin of the upper against the flange I0 of the toe form in order to prevent displacement of the welted margin during the advancement of the toe mold 14 from its position illustrated in Fig. 9 into its position illustrated in Fig. 11. As illustrated in Fig. 10, the wiping edge 232 of the wiper plate 61 has a shape generally complemental to the edge contour of the toe form I2.

In order to cause the opposite side portions of the welted margin of the upper to be brought into a horizontal plane with the edges of the welt parallel to the flange I0, as shown in Fig. 10, a plate 234 (Fig. 4) is slidably mounted on gibs (not shown) on the bottom of the wiper plate and is advanced into welt conforming position by the same cam which operates the wiper. The welt conforming plate engages the outer edge face of the welt and brings the opposite side portions of the welted margin of the upper into their position shown in Fig. 10. To prevent the welt from accidentally moving upwardly out of engagement with the edge face of the welt conforming plate two retainer plates 236 (Fig. are secured to the upper surface of the conforming plate at opposite sides thereof and arranged to project inwardly over the welt. Said plates are rectangular in shape and are so arranged that they are received in parallel longitudinal grooves in the bottom of the wiper plate. In order to bring the welt at opposite sides of the toe portion of the upper into "a horizontal position for engagement by the conforming plate 234 a wedge shaped welt lifter 238 (Figs. 4, 8 and 12) is mounted on each of the upper supporting plates 60 and arranged to be engaged by the end portions of the welt conforming plate as it advances into welt conforming position. Referring to Fig. 12, the illustrated welt lifter is slidably mounted on the upper surface of the upper supporting plate 60 and is held against widthwise movement by an offset downwardly extending tongue 240 mounted in a groove in the welt conforming plate. For retracting the welt lifter a spring 242 has one end anchored to a headed pin 244 projecting outwardly from the welt lifter and the other end anchored to a fixed pin 246 (Fig. 8). The path of movement of the welt lifter is parallel to the flange '64 of the upper supporting plate 60 and the welt lifter is constructed and arranged to be positioned in substantially contiguous relation to said flange as shown in Fig. 12. The upper surface of the welt lifter lies in the same plane as the edge of the flange 64 and thus it will be seen that the welt lifter will operate to bend the welt into a substantially horizontal position and position its outer edge face for engagement by the edge face of the welt conforming plate. For operating the welt conforming plate the wiper slide has secured to an upwardly offset portion of its bottom surface a cross bar 248 (Fig, 7) and the welt conforming plate has pivotally mounted on a cross pin 254 in its rear end portion an angle piece 250 having an upwardly extending detent 252 constructed and arranged to be engaged by the cross bar 248. In order to permit the wiper to advance relatively to the welt conforming plate during the latter part of its operating movement an abutment 256 is arranged to be engaged by a forwardly projecting bumper portion 258 of the angle piece when the welt conforming plate comes to the limit of its operating movement. The engagement of the bumper with the abutment causes the angle piece to swing in a counterclockwise direction as seen in Fig. 7 until the advancement of the welt conforming plate is arrested by the engagement of a downward extension 26!] of the welt conforming plate with the abutment 256.

Such motion of the angle piece disengages the detent 252 from the cross bar 248 and permits the wiper to continue its advancement. The wiper and the welt conforming plate are retracted as a unit until a spring pressed bumper herein illustrated as a headed pin 262 (Fig. 4) surrounded by a spring and mounted in a downward extension 264 of the welt conforming plate engages the abutment 256 to arrest the retraction of the welt conforming plate. During the retracting movement of the welt conforming plate the angle piece 250 is restored to its initial position illustrated in Fig. 7 by the action of a leaf spring 266 secured to the bottom of the welt conforming plate and arranged to engage said angle piece and bring its forward extremity into engagement with a recessed portion of the welt conforming plate 234. In this position of the angle piece the beveled forward surface of the detent 252 is arranged to be engaged by the cross bar 248 as the wiper continues its retraction after the welt conforming plate is arrested. It will be understood that the angle piece yields to permit the wiper to complete its retracting movement and to permit the return of the cross bar into its detent engaging position illustrated in Fig. 7.

In positioning the extremity of the toe portion of the upper in the machine the welted margin is so arranged that asupporting plate 268 enters the welt crease as shown in Fig. 7. The plate supports the welted margin in a slightly elevated position so that the depressor plate I42 may act on the welted margin to lTlOVB it downwardly into predetermined relation to the toe form 12. The plate 268 is carried by mechanism mounted on the slide 62 which mounts the upper supporting plates 60, said plate being so mounted that it is retracted automatically during the advancement of the wiper to provide clearance for the overwiping operation. Referring to :Fig. 7, the plate 268 is supported by a link 2'50 and a bent lever 212 both of which are pivotally connected to a plate 214 secured to the lower end portion of the plate 268. The rear end of the link 2'10 and the central portion of the lever 212 are pivotally mounted on a bracket 216 secured to the slide 62. The plate 268 is yieldingly held in its elevated position illustrated in Fig. 7 by a torsion spring 273 which acts against a lever 2B0 pivotally mounted on a downward extension of the bracket 216 and connected by a link 282 to the rear end of the bent lever 272. The elevated position of the plate 260 is determined by the engagement of a lug 2-84 on the bent lever with a fixed pin 286 For automatically retracting the plate 268 a cam slide 288 is constructed and arranged to engage a roll 290 mounted on the arm 280 and said slide is connected by a link 292 to the cam operated lever 2| 2. It will be seen that the cam slide 288 engages the roll 290 at an early stage in the advancement of the wiper and swings the bent lever 212 in a counterclockwise direction, as seen in Fig. 7, to move the plate 268 downwardly and rearwardly into a position remote from the welted margin of the upper and out of the path of movement of the wiper.-

After the wiper has completed its overwiping movement the upper supporting plates 60 are retracted into their position illustrated in Fig. 11 to provide clearance for the upper expanding operation of the toe mold 14. In the illustrated machine retracting movement isimparted to the upper supporting plates by a cam 200 (Fig. '7) secured to the shaft 54 and provided with a groove 296 in which operates a roll 298 at the end of a bent lever 300 pivotally mounted on the shaft I30 and having a bored trunnion block 302 pivotally mounted in its upper end portion. Slidably mounted in said trunnion block is a rod 304 the forward end of which has a head which is pivotally' mounted in lugs 306 projecting downwardly from the slide 62. In retracting the upper supporting plate the cam lever 300swings in a clockwise direction as seen in Fig. 7 and the trunnion block 302 acts on a nut 308 on the threaded end portion of the rod 304. In returning the upper supporting plates to their operating position the cam lever 300 acts against a spring 3l0 surrounding the rod 304 and bearing at its forward end against a collar 312 secured to said rod. During the operation of the toe form 12 to clamp the upper against the supporting plates 60 said plates may move rearwardly against the pressure of the spring 3|0, said pressure being sufiicient to permit the upper to be clamped and held securely in position between the supporting plates and the toe form 1-2.

Referring to Figs. 6 and 9-,- the toe mold 1-4 is 1b se ureaa heaned screw '3 Fig. 9) to a slide 316 having interlocking tongue "and groove con nections to the forward portion or the ead 16. When the head "16 is initS advanced position, i1- lustrated in 6 and 9, the forward surface M8 or the headnipen which the slide 3 l6 moves, is soarranged that the tee mold has an operat mg movement down-warms; thd t'd'ewai'dly from its position in Fig; 9 to its positibn illustrated in Fig. '11. The slide ilfiishbrfiml-W held in its ret-i'ac'te'd position illustrated in Figs. 6 and 9 by a spring '320 monnt'ed in entire 322 in the head 16 and arranged tohear againsta head 324 (Fig. 6) secured to the slide 316. For "actuating the toe mold the spur gear 52 secured to the cam shaft 54 has a cam groove 326 formed in its left side face. Mounted 'in saidr'groov'e is :a roll 328 carried at the outer end of an arm 330 freely mounted on the shaft 130. A short arm 332 projecti'ng forwardly from the hub of the arm 330 is connected by a link 334 to a level 336 freely mounted on the shaft 136 and connected by a short link 338 to a lever .340 freely mounted at its rear portion on arshaft 342. At its forward end the lever 340 i-carries a roll 344 which registers with a fiat bottom surface 346 of a lever 348 when said-lever has been brought into operative position by downward swinging movement of the head 16. The :lever 348 is fulcrumed on a cross pin 350 mounted in upwardly extending ears 352 of the head :16 and carries at its for- Ward end an adjustable screw 3'54 arranged to engage the head-324 of the slide 316. The screw is held in contact with the head by a relatively light torsionspring 356.- At an early stage in the operation of the lever (33.6 and before the toe mold 14 has applied any appreciable molding pressure to the upper a lever 358 (Fig. 6) mounted on a fixed fulcrum 360 is actuated by the lever 336 to impart upper clamping pressure to the wiper plate 61. For connectin the lever 358 to the lever 336 al-ink or rod 362-is pivotally mounted on the rear end portion of the lever 350 and projects upwardly therefrom and through a diametrical bore in a cross pin 364 freely mounted in the bifurcated forward end portionof t-he lever 336. The link 362 is extended upwardly beyond the cross pin- 364 and carries on said extension a spring 366 which bears against a washer backed up by an adjustable nut .368; The lever 350 has a downwardly ofisetpresse-r foot 310 formed in its forward portion and aranged; to engag the w per slide 68 at -a point substantially adjacent to the toe end of the upper mounted in themachine. It will be seen that the presser foot 3'lll' exerts a downward pressure on the wiper slide '68 causing it to swing slightly upon its suppQ ftingrolls 226 thereby causingthe wiper plate 61 to press the welted narg'irr of the upper downwardly upon the flange flfl of thetoe form 12 to clamp it securely in position for the toe molding operation. It will be remembered that-at this stagein the operation of the machine the; forward portion of the wiper has moved upward-1y slightly away from the forward rolls 224 and is supported by the welted margin of the upper. The slight downward movement imparted to the forward portion of the wiper by the presser-foot 310 will not in any cigie bringthe wiper into contact with the rolls 2 After the toe mold 14 comes to the limit of its downward movemenhas shown' in; Fig. 11, the cam shaft 54 stops and the-shoeisheld in its po-' sition illustrated in- Fig. 11 with the Weltedmarin-clamped between thewiper plate 61 and the upwardly extending flange 10 of the toe form 12 and the toe portion of the upper maintained in its expanded condition by the toe mold 14. The upper 66 remains in its position shown in Fig. 11 until another upper has been mounted in the other station of the machine and the treadle 82 and the switches 392 and 394 have been operated to cause the cam shaft to turn 180 to effect the operating cycle of the upper shaping parts in said second station and to retract the operating mechanism to release the upper in the first station. In the retracting cycle, the toe mold 14 is retracted first moving from its position in Fig, 11 to its position illustrated in Fig. 9. Thereupon the wiper and the welt conforming member are retracted, the upper supporting plates 69 are moved forwardly into upper supporting position, and a rise 312 (Fig. 1) on the cam 200 engages a roll on the bell crank lever I96 and turns said lever in a clockwise direction as seen in Fig. 1 to return the valve to its exhaust position whereupon the spring I92 operates through mechanism hereinbefore described to return the head 16 to its retracted position illustrated in Fig. 1. During the latter part of the retracting cycle the roll on the bell crank lever I04 moves into a recess 314 in the cam I94 as the arm I moves downwardly by gravity into engagement with the pin I08, as shown in Fig. 1.

In the illustrated machine the two stations are constructed and arranged to operate respectively on the toe portion and heel portion of a prewelt upper. The mechanism in the station for operating on the heel portion of the upper is partially illustrated in Fig. 2, the cam for operating the heel wiper being identified by the numeral 384. It will be seen that said mechanism is substantially the same as the mechanism provided in the station hereinbefore described except that there is no vertically moving upper-expanding form in the heel station nor is there any mechanism for retracting the upper supporting plates, said plates being constantly urged against the outer surface of the upper by spring pressure.

In order to prevent the operation of the cam shaft 54 before the head 16 has been advanced there is provided in the electric circuit operated by the push button switch 58 (Fig. 1) a push button switch 316 mounted in a box 318 secured in fixed position such that the push button will be operated by the arm I20 as the piston 80 comes to the limit of its downward movement. It will be seen that the provision of the push button switch 316 prevents the operation of the solenoid 56 before the head 16 has been advanced into its operating position. There is also provided in the electric circuit operated by the push button switch 58 a push button switch 380 mounted in a box 382 secured in a fixed position in the rear portion of the machine and arranged to be engaged by the rear end of the wiper slide as it comes to the limit of its retracting movement. The provision of the push button switch 380 makes it impossible to start the retracting cycle of the toe station by operating the push buttons for the toe station, said retracting cycle being started by operating the push buttons for the heel station of the machine, thus insuring the alternate operation for which the machine is intended.

Referring to Fig. 13, diagrammatically illustnating the electric wiring of the machine, the main switch is identified by the numeral 384 and switches for the two heat units by the numerals 386 and 388. One side of the line leads to one contact of a relay 390 and through said relay to the clutch operating solenoid 56. The relay 390 is operated to close the circuit to the solenoid by pressing the center push button 392 and one or the other of the two push buttons 58 and 394, depending upon which station of the machine is to be operated. When the first half of the cycle of the toe station is to be initiated the push buttons 58 and 392 are pressed, thus closing a circuit leading to the coil of the relay 390 through the push button switch 392, the forward contacts 4I4 of the push button switch 394 and the rear contacts 4 I6 of the push button switch 58 in the sequence indicated, then through the switch 396 of an interlocking relay M2, the micro-switch 316 closed by the piston-actuated arm I20 and the microswitch 380 closed by the retraction of the wiper slide 68. The illustrated electrical organization requires the use of both hands of the opertor to start the machine, thus preventing injury to either hand of the operator while the machine is in motion. In order to make it impracticable for the operator to secure the bush button 392 in its closed position and operate each station of the machine by a single push button two interlocking relays 402 and M2 are provided, the purpose of which is to prevent the operation of either station without first having released said push button 392. The relay 402 controls the operation of the toe station and the relay M2 the operation of the heel station. The interlocking relay 402 comprises a normally open switch 404 and a normally closed switch 406. When the push buttons 58 and 392 are pressed, current passes through a cross connection 408 and the coil MD of the interlocking relay 402 closing the switch 404 and opening the switch 406. As long as the push button switch 392 remains closed the coil 4I0 will continue to be energized, the switch 404 remaining closed and the switch 406 remainin open. With the switch 406 open the heel station cannot be operated since that switch is in the line through the push button switch 392 and the rear contacts MB of the push button switch 394 to the relay 390; and the operation of the second half of the cycle of the toe station cannot be initiated by pressing the push buttons 392 and 58 because the advancement of the wiper slide 68 in the operation of the first half of the cycle has permitted the micro-switch 380 to open. The operation of the heel station by pressing the push buttons 392 and 394 will be understood from the foregoing description. It will also be understood that the interlocking relay 4I2 serves the same purpose in the heel station that the relay 402 serves in the toe station.

In the operation of the machine an upper to which an outsole attaching welt has been stitched in accordance with the usual practice in prewelt shoemaking is mounted in inverted position upon the work supporting plates 60 and the extremity of the toe portion of the upper is so arranged that the plate 268 (Fig. '1) enters the welt crease and locates the upper slightly above the position in which it will be clamped for the toe molding operation. After orienting the upper relatively to the operating instrumentalities of the machine the operator depresses the treadle 82 (Fig. 1) to start the hydraulic cycle of the toe station which advances the head 16 from its position illustrated in Fig. 1 into its position illustrated in Fig. '1. If it should happen that the operator finds it nec-' essary to correct the orientation of the upper after the head 16 has been advanced into its po- 3 3 siti'on illustrated in Fig. 7 and before the cam cycle has been initiated he need only take his foot off the I-trea'clle:82 and the spring I92 (Fig. 1) will retract the 'pist'oni8ll and return the head it to its retracted position. In the course of the hydraulic cycle the depressor plate 142 moves downwardly into engagement with the inner edge of the Welt, which at that time is the uppermost portion of the inverted supper and moves the extremity of the toe portion :of the upper downwardly into a predetermined :heig-htwise position just before the toe form 12 clamps the upper against the flange 6'4 of the supporting :plates 60. The slide "-62 which mounts the supporting plates 60 yields slightl :to the advancement of the toe form 1?, slightly compressing the spring 3H3 which holds the slide -62 in its advanced position. After the upper has been accurately oriented on the work supporting plates :and clamped between said plates and the toe Iform H32 the operator presses the :push button 58 and 39.2 to initiate the first halfof the icamicycle while holding the ftreadle r82 depressed to retain the head TITS in its :advanced :position. iDuling' the first half of the cycle of the toe station-the .Welt conforming plate 23 operating in conjunction with the welt lifters brings the welt at opposite .isides of the toe portion of "the upper into tits :p'osition illustrated in Fig. and thereupon the wiper assembly advances to wipe *the welted margin at 'the extremity of the toe portioniofztheupper in over the toe form 72 and to press the welted margin of the entire toe portion :downwardly clamping it against the upwardly ;extendin ;flange 1B of the toe form. The toe mold sillld ithenadvancedto expand and mold .the itoe zportion 10f the upper while'the upper supportin-giplates iii). are retracted to :provide clearance Zfor the molding opera- 'tion. The machine comes to irest :at the end .of the firsthalf of the cam cycle fltheltoestation withthe welted marg'inadf theiuppenclampedba tween the wiper'plate 2181 and iithe toe Iform l2 'and the toe mold 'l-t'insit-s. advanced position-illu'strated in Fig. 11.

whileth'e cam operated mechanism in the toe station is performing the first half of its cycle the L cam actuated mechanism in the heel station he elstation and an upper" to be molded is brought into position. The time requiredfonthe handling of the-Worklis su'ificient totpei n'iit the upper in the-toe station to set .to such an extentthat -itWill-reta-in, to a substantialeextent,cthe-shape imparted thereto by the operating instrumentalities. During the next succeeding operation of the cam mechanism the upper in the heel station is molded and the upper in the toe station is released, returning the mechanism in said station to its position illustrated in Fig. 1.

Having thus described the invention, What is claimed as new and desired to be secured by Letters Patent of the United States is:

1. In a machine for shaping uppers, the combination with means engaging the outer surface of the end portion of an upper, a form constructed and arranged to engage the inner surface of the upper and to clamp the upper against said means, and a wiper for wiping the margin of the upper over said form, of hydraulic means for other cam operated means v.the' valve.

operating :said form, and ether means iorioperpating the Wiper.

- 2. In an-upper shaping machine, :the combina- .tion with means engaging the vouter.suriiauze.of end portion of an upper, .an inner .iormcperable to clamp the upper against said .smeans, and a wiper .for wiping the margin of the :upper over said form, of an electric motor, a hydraulicgpump operated by said motor, a cam operatedrbycaid motor, hydraulically operated mechanism zfor actuating the .form, and connections from said ;cam

for operating the wiper.

-er for'shaping the end portion of the upper, :Ofifill electric motor, a hydraulic pump actuated {by said motor, a cam actuated by said motor, mea-ns operated by saidpump for actuating said form, and connections ircmsaid cam foractuatingsaid expander.

4. In a machine :for shaping -uppers,=the,oom-

vbination with means engaging the outer :surface of an endportion of an ll-21 81, and ;a form ,con-

structed andarranged to. engage ,the .-inner,s,urface of the upper and clamp the upper against said means, of a pressure fluid actuated piston,

connections from said piston -.for .-advancing said form to clamp the upper against said means, ;a

valve controlling the operation of said piston, .manually operated means-for actuating-said-yahie to cause the pistonto be-actuated, and a spring :operating upon return movement. of'said-manual- .ly operated means to return the pistonrandssaid .inner form to their respective ;initial ,p,0sitions.

5. "Ina machine for shapin runners, the;c,ombination with means engaging the outer surface v.ofan end portionof an upper, and;a;forml constructed and arrangedto engage ,thednnerzsur- 'face of the upper and'clamp the upp,er against said means, of a pressurefiuidactllated piston, connections from said piston for advancing said form to clamp the upper against said means, :a valve controlling the-operation pf said piston,

.manually operated means for actuating said valveto cause the pistonto be actuated, a; spring operating upon return movement-of said; manually operatedmeans to-returnithe piston andisaid inner form to their respectiveinitial positions, and cam operated means;f.or disconnecting isaid manually operated means from the valve, .,and fonreverselmoperating '6. :In a machine for shapingpreweltuppers,

-means for supporting.- aninvertedtpreweltsupper by engagement within :the rwe'ltccrease, an inner form operable to clamp the upper against said supporting means, a depressor for moving the welted margin of the upper downwardly into a predetermined heightwise position, and means operable first to actuate said depressor, then to bring the inner form into clamping engagement with the upper, and finally to release said depressor to permit it to return to its initial elevated position.

7. In a machine for shaping prewelt uppers, means constructed and arranged to support an inverted prewelt upper by engagement within the welt crease, an inner form for clamping the upper against said supporting means, a depressor for moving the welted margin downwardly into a predetermined heightwise position, means for inner form, a member carried by said wiper and constructed and arranged to engage the outer edge face of the welt to conform the welted margin to the contour of the inner form, disconnectible means for causing the conforming member toadvance with the wiper, a member for disconnecting said means and a stop for positively arresting the advancement of said conforming member.

9. In a machine for shaping prewelt uppers, means for supporting an inverted prewelt upper by engagement within the welt crease, a welt lifter slidably mounted in a way in said supporting means and having a wedge shaped end portion constructed and arranged to engage the upper attaching surface of the welt.

'10. In a machine for shaping prewelt uppers, means for supporting an inverted prewelt upper by engagement within the welt crease, a welt lifter slidably mounted in a way in said supporting means and having a wedge shaped portion constructed and arranged to engage the upperattaching surface of the welt, and a member constructed and'arranged to engage the outer edge face of the welt to conform the welt to a predetermined contour, said conforming member being constructed and arranged to actuate said welt lifter.

11. In a machine for shaping uppers, the combination with means constructed and arranged to engage the outer surface of an end portion of an upper, an inner form operable to clamp 'the upper against said means, and a wiper for wiping the margin of the upper over said inner form, of hydraulic means for actuating said inner form, a cam for actuating said wiper, a solenoid for controlling the operation of said cam,

an electric circuit to said solenoid, and a switch in said circuit constructed and arranged to be operated by said hydraulic mechanism upon the completion of the advancement of said inner form.

12. A machine for shaping uppers having two alternately operating stations, each station having means constructed and arranged to engage the outer surface of an end portion of an upper, an inner form operable to clamp the upper against said means, a wiper for wiping the mafgin of the upper over said inner form, a pressure fluid actuated piston for actuating said inner form, and a cam for actuating said wiper, said machine having also one cam shaft mounting the'cams in each station in predetermined relation to each other.

13. A machine for shaping uppers having two alternately operating station, each station having means constructed and arranged to engage the outer surface of an end portion of an upper, an inner form operable to clamp the upper against said means, a wiper for wiping the margin of the upper over said inner form, a pressure fluid actuated piston for actuating said inner form, and a cam for actuating said wiper, said machine having also one cam shaft mounting the cams in each station in predetermined relation to each other, a driven shaft, means including a clutch-operating solenoid for controlling the operation of said cam shaft, two electric circuits to said solenoid one in each station of the machine, and a switch in each circuit constructed and arranged to be closed by the wiper upon the completion of its retracting movement.

14. In a machine for shaping shoe uppers, the combination with means constructed and arranged to engage the outer surface of an end portion of an upper and a form constructed and arranged to engage the inner surface of the upper and clamp it against said means, of a pressure fluid operated member for operating the inner form to clamp the upper against said means, and means operable at the will of the operator for retracting the inner form without completing the cycle of the machine.

15. In a machine for shaping shoe uppers, the combination with means constructed and arranged to engage the outer surface of an end portion of an upper, a, form constructed and arranged to engage the inner surface of the upper and clamp it against said means, and a wiper for wiping the margin of the upper in over said inner form, of separate power actuated mechanisms for operating the form and the Wiper, the mechanism for operating the form being operable independently of the mechanism for operating the wiper.

GERTRUDE A. HOLMGREN,

Administratria: of the Estate of Eric A. Holmgren,

Deceased.

REFERENCES CITED UNITED STATES PATENTS Name Date Holmgren Feb. 26, 1946 Number 

